JP2005109633A - Wireless communication apparatus and wireless communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication apparatus and a wireless communication method capable of preventing all data within one slot from being aborted and decreasing transmission of idle data. <P>SOLUTION: A transmitter is provided with: a first error detection data generating section for generating error detection data of transmission data; a second error detection data generating section for dividing the transmission data into a plurality of data sequences and generating the error detection data of each of the divided data sequences; first and second frame generating sections for generating a transmission data sequence from the error detection data and the transmission data; and a control section for controlling the entire transmitter. The control section selects the transmission data sequence for a prescribed period and transmits the selected transmission data sequence to a transmission section. A receiver includes a second error detection section for dividing received data into a plurality of data sequences to detect respective errors of the divided data sequences. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wireless communication apparatus that performs communication of voice data and the like by a wireless signal, and a wireless communication method for performing communication of voice data and the like by a wireless signal.

  In a wireless communication apparatus using a time division multiplexing system (TDMA system), a certain time is divided into equal intervals, and each divided time is assigned to a plurality of communications to multiplex communications. A practical example using the time division multiplexing method is PHS. In PHS, 5 msec is a basic unit (hereinafter referred to as “frame”), and one frame is divided into eight time units called slots, and multiplexing is performed. Eight slots in one frame are divided into an uplink slot (transmission from the terminal to the base station) and a downlink slot (transmission from the base station to the terminal), and when the base station and the terminal communicate bidirectionally, Communication is performed using a pair of four slots apart from each other, and up to four bidirectional communications can be multiplexed (see Non-Patent Document 1).

In the case of voice communication, data transmitted in one slot is composed of synchronization data for bit synchronization and frame synchronization, control data as control data for disconnection, voice data, and CRC data for error detection. Then, transmission is performed with the same data configuration in each slot. On the receiving side, synchronization data is detected, the reception timing of the slot is determined, control data, audio data, and CRC data are separated from the received data string, and processing such as reproduction of audio data is performed. When reception is not possible, that is, when it is determined that there is an error in the control data and audio data received by the CRC calculation, the data in the corresponding slot is discarded, and the audio signal reproduced from the received data is interrupted. .
Second Generation Cordless Telephone System Standards (Radio Industry Association RCR STD-28 3.2 Edition, pages 19-104)

  As described above, in the conventional wireless communication apparatus using the TDMA system, one error detection data is added to transmission data such as control data and voice data of one slot. When an error occurs even with one bit, it is necessary to discard all data in the corresponding slot, and there is a problem that a large information loss (disconnection of received voice in voice communication) occurs. In addition, the data structure of the slot during communication is always a combination of control data and communication data such as voice data, and even when there is no need to send control data, control data in the slot is transmitted every time. In this part, it is necessary to transmit idle data indicating that there is no control data, and there is a problem that there is a lot of waste.

  In this wireless communication apparatus and wireless communication method, it is required to prevent discarding all data in one slot and reduce transmission of idle data.

  The present invention can prevent discarding of all data in one slot and reduce transmission of idle data, and prevents discarding of all data in one slot. An object of the present invention is to provide a wireless communication method for reducing transmission of idle data.

In order to solve the above-described problems, a wireless communication apparatus according to the present invention includes a transmitter and a receiver that perform communication using a time division multiplexing method, and transmits synchronization data and error detection data to transmission data transmitted in one slot. A wireless communication apparatus that performs additional communication, and a transmitter includes a first error detection data generation unit that generates error detection data of transmission data transmitted in one slot, and transmission data transmitted in one slot Is divided into a plurality of data strings, and a second error detection data generating unit that generates error detection data of each of the divided data strings, an error detection data generated by the first error detection data generating unit, and transmission A first frame generation unit that generates a transmission data sequence to be transmitted in one slot from the data, and error detection data generated by the second error detection data generation unit and transmission A second frame generation unit that generates a transmission data sequence to be transmitted in one slot from the data, and a transmission data sequence generated by the first frame generation unit or a transmission data sequence generated by the second frame generation unit A transmission unit for transmission, a first slot timing measurement unit that counts a predetermined period, and a control unit that controls the whole; the control unit generates a first frame at a period determined by the slot timing measurement unit The transmission data sequence generated by the transmission unit or the transmission data sequence generated by the second frame generation unit is selected and sent to the transmission unit, and the receiver receives an error in the reception data received in one slot. A first error detection unit for detecting and a second error detection unit for dividing the received data received in one slot into a plurality of data strings and detecting each error of the divided data strings The second slot timing measurement unit that counts a predetermined cycle and the control unit that controls the whole are detected by the first error detection unit at a cycle determined by the slot timing measurement unit. A configuration is provided for selecting whether to process the received data based on the error detection result or to process the received data based on the error detection result detected by the second error detection unit.

  As a result, it is possible to prevent discarding all data in one slot and to obtain a wireless communication apparatus that can reduce transmission of idle data.

  In order to solve the above-described problems, a wireless communication method of the present invention includes a transmitter and a receiver that perform communication using a time division multiplexing method. Synchronization data and error detection data are transmitted to transmission data transmitted in one slot. A wireless communication method in a wireless communication apparatus for performing additional communication, wherein a transmitter includes a first error detection data generation step for generating error detection data of transmission data transmitted in one slot, and a slot. The transmission data to be transmitted is divided into a plurality of data strings and generated in the second error detection data generation step and the first error detection data generation step for generating the respective error detection data of the divided data strings. A first frame generation step for generating a transmission data sequence to be transmitted in one slot from the error detection data and the transmission data, and a second error A second frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data and the transmission data generated in the detection data generation step, a first slot timing measurement step for counting a predetermined period, and a slot A control step of selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step at a cycle determined in the timing measurement step; An error of received data received in one slot in the receiver, the transmission step transmitting the transmission data sequence generated in one frame generation step or the transmission data sequence generated in the second frame generation step The first error detection step for detecting the received data and the received data received in one slot A second error detection step for detecting an error in each of the divided data strings, a second slot timing measurement step for counting a predetermined period, and a period determined by the slot timing measurement step Select whether to process the received data based on the error detection result detected in the first error detection step or to process the received data based on the error detection result detected in the second error detection step And a control step.

  As a result, it is possible to obtain a wireless communication method for preventing discarding all data in one slot and reducing transmission of idle data.

  The wireless communication apparatus according to the present invention includes a transmitter and a receiver that perform communication using a time division multiplexing method, and performs wireless communication by adding synchronization data and error detection data to transmission data transmitted in one slot. A communication apparatus, wherein a transmitter divides transmission data transmitted in one slot into a plurality of data strings, and a first error detection data generation unit that generates error detection data of transmission data transmitted in one slot The second error detection data generation unit that generates error detection data of each of the divided data strings, and the error detection data generated by the first error detection data generation unit and the transmission data are transmitted in one slot. 1 slot from the error detection data and transmission data generated by the first frame generation unit that generates the transmission data sequence to be transmitted, and the second error detection data generation unit A second frame generation unit that generates a transmission data sequence to be transmitted, a transmission unit that transmits the transmission data sequence generated by the first frame generation unit or the transmission data sequence generated by the second frame generation unit, and a predetermined A transmission data string generated by the first frame generation unit at a cycle determined by the slot timing measurement unit, having a first slot timing measurement unit that counts the cycle and a control unit that controls the entire cycle. Or a transmission data sequence generated by the second frame generation unit, and sends it to the transmission unit, and the receiver detects the error of the reception data received in one slot. A second error detection unit that divides received data received in one slot into a plurality of data strings and detects errors in the divided data strings, and counts a predetermined period A second slot timing measurement unit and a control unit for controlling the whole; the control unit is based on the error detection result detected by the first error detection unit at a period determined by the slot timing measurement unit; By selecting whether to process the received data or to process the received data based on the error detection result detected by the second error detector, it is possible to determine whether each divided data is normal data. This makes it possible to obtain an advantageous effect that the number of data discarded when it is detected that the data is abnormal can be reduced.

  Further, by adding control data to the transmission data sequence generated by the first frame generation unit or the transmission data sequence generated by the second frame generation unit to generate the transmission data sequence, the control data is transmitted during communication. When there is no need to send every time and there is no need to send control data, it is possible to reduce idle data transmission triggers indicating that there is no control data sent in the control data portion, and to reduce unnecessary transmission The advantageous effect that it can be obtained.

A slot type data indicating a slot type of a voice data slot or a control data slot in transmission data transmitted in one slot, which includes a transmitter and a receiver that perform communication using time division multiplexing; A wireless communication apparatus that performs communication with synchronization data and error detection data added thereto, wherein a transmitter includes a first error detection data generation unit that generates error detection data of transmission data transmitted in one slot, and 1 Generated by a first error detection data generation unit and a second error detection data generation unit that divides transmission data transmitted in the slot into a plurality of data sequences and generates error detection data of each of the divided data sequences First frame for generating a transmission data sequence to be transmitted in one slot from the error detection data, the transmission data and the first slot type data A second frame generation unit that generates a transmission data sequence to be transmitted in one slot from the error detection data generated by the second error detection data generation unit, the transmission data, and the second slot type data; A control data frame generation unit that generates a transmission data sequence including control data and third slot type data, a transmission data sequence generated by the first frame generation unit, and a transmission data sequence generated by the second frame generation unit And a transmission data sequence generated by the control data frame generation unit, and a control unit for controlling the entire transmission data sequence generated by the first frame generation unit. And the transmission data sequence generated by the second frame generation unit and the transmission data sequence generated by the control data frame generation unit are selected and transmitted to the transmission unit. A slot type discriminating unit for discriminating the slot type based on the third slot type data, a first error detecting unit for detecting an error in received audio data received in one slot, and a reception received in one slot A second error detection unit that divides audio data into a plurality of data strings and detects errors in the divided data strings, and a third error detection that detects errors in reception control data received in one slot And a control unit that controls the whole. The control unit processes received data based on the error detection result detected by the first error detection unit based on the determination result of the slot type determination unit. The received data is processed based on the error detection result detected by the second error detection unit, or the received data is processed based on the error detection result detected by the third error detection unit. By selecting whether to perform processing, it becomes possible to communicate in two data formats based on the slot type, and for the data length for error detection and correction for each divided data and for the data that is not divided When the error detection / correction data length is the same, the length of the transmission data plus the error detection / correction data is sent without dividing the data compared to when the data is divided and sent. In the slot that transmits data without dividing the data, an unused part is created in the data in the slot, and this unused part is used as a control data field for transmitting control data such as disconnection. It is possible to switch the data format periodically, multiplex the control data and communication data and enable communication. It is possible to reduce the number of data to be discarded when it is detected normally, and it is not necessary to send control data every time during communication. An advantageous effect that idle data transmission triggers indicating that there is no control data to be transmitted can be reduced and wasteful transmission can be reduced.

  Further, by indicating that the first and second slot type data are slots of audio data and the third slot type data is a slot of control data, the audio data and control data are the same slot. It is possible to obtain an advantageous effect that it becomes possible to transmit data by using the

  Furthermore, in the transmission data sequence generated by the second frame generation unit, the audio data is divided into four, so that it is possible to reduce the number of data discarded when data abnormality is detected. Is obtained.

Furthermore, a wireless communication apparatus that includes a transmitter and a receiver that perform communication using a time division multiplexing method and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot, The transmitter divides the transmission voice data transmitted in one slot into a plurality of data strings and a first error detection data generation unit that generates error detection data of transmission voice data transmitted in one slot. A second error detection data generation unit that generates error detection data of each of the data strings, a third error detection data generation unit that generates error detection data of transmission control data transmitted in one slot, and a first And a first format type indicating that the error detection data, the transmission data, and the audio data generated by the third error detection data generation unit are not divided. The error detection data, the transmission data, and the audio data generated by the first frame generation unit that generates a transmission data sequence to be transmitted in one slot from the data, the second and third error detection data generation units are divided. A second frame generation unit that generates a transmission data sequence to be transmitted in one slot from second format type data indicating that the transmission data sequence is generated by the first frame generation unit or the second frame generation A transmission unit that transmits the transmission data sequence generated by the unit, and a control unit that controls the whole. The control unit is a transmission data sequence generated by the first frame generation unit or a second frame generation unit. Any one of the generated transmission data strings is selected and transmitted to the transmission unit, and the receiver determines whether the format type is first or second and receives the received data according to the determination result of the first or second. A format determination data separation unit for separating data, a first error detection unit for detecting an error in received voice data received in one slot, and a received voice data received in one slot into a plurality of data strings A second error detection unit that detects each error of the data string divided together, a third error detection unit that detects an error in reception control data received in one slot, and a control unit that controls the whole The control unit determines whether to process the received data based on the error detection results detected by the first and third error detection units according to the format type determination result in the format determination data separation unit. By selecting whether to process the received data based on the error detection results detected by the second and third error detection units, two data are set based on the slot type. If the data length for error detection / correction for each divided data is the same as the data length for error detection / correction for undivided data, transmission is possible. The data plus the error detection / correction data is shorter than sending the data without dividing it, and sending the data without dividing the data. In the slot, an unused part can be created in the data in the slot, and this unused part can be used as a control data field for transmitting control data such as disconnection, and the data format can be switched as needed to communicate with the control data. Multiplexed data can be communicated, and when data is divided and sent, it is possible to reduce the number of data to be discarded when a data error is detected. In addition, it is not necessary to send control data every time during communication, and when there is no need to send control data, the opportunity to send idle data indicating that there is no control data sent in the control data part is reduced. Thus, an advantageous effect that wasteful transmission can be reduced can be obtained.

  Further, the third error detection data generation unit does not generate error detection data of the transmission control data, and the second frame generation unit does not include the transmission control data in the transmission data string and generates the third error detection data. By not using the error detection data generated in the transmission part for generating the transmission data string, it is possible to reduce idle data transmission triggers indicating that there is no control data transmitted in the control data part, and useless transmission The advantageous effect that it can be reduced is obtained.

  Further, a wireless communication method in a wireless communication apparatus, which includes a transmitter and a receiver that perform communication using time division multiplexing, and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot In the transmitter, a first error detection data generation step for generating error detection data of transmission data transmitted in one slot and transmission data transmitted in one slot are divided into a plurality of data strings. The second error detection data generation step for generating each error detection data of the data string divided together with the error detection data generated in the first error detection data generation step and the transmission data are transmitted in one slot. The error generated in the first frame generation step for generating the transmission data string and the second error detection data generation step. A second frame generation step for generating a transmission data string to be transmitted in one slot from detection data and transmission data, a first slot timing measurement step for counting a predetermined cycle, and a cycle determined by the slot timing measurement step, A control step for selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step, and the transmission generated in the first frame generation step And a transmission step of transmitting the transmission data sequence generated in the data frame or the second frame generation step, and in the receiver, a first error detection step of detecting an error of the reception data received in one slot The received data received in one slot is divided into a plurality of data strings and divided. Detected in the first error detection step at a period determined by a second error detection step for detecting each error in the data row, a second slot timing measurement step for counting a predetermined period, and the slot timing measurement step And a control step for selecting whether to process the received data based on the error detection result or whether to process the received data based on the error detection result detected in the second error detection step. It is possible to determine whether or not each piece of data is normal data, and it is possible to obtain an advantageous effect that it is possible to reduce the number of data to be discarded when a data abnormality is detected.

Further, by generating control data by adding control data to the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step, the control data is transmitted during communication. When there is no need to send every time and there is no need to send control data, it is possible to reduce idle data transmission triggers indicating that there is no control data sent in the control data portion, and to reduce unnecessary transmission The advantageous effect that it can be obtained.

  A slot type data indicating a slot type of a voice data slot or a control data slot in transmission data transmitted in one slot, which includes a transmitter and a receiver that perform communication using time division multiplexing; A wireless communication method in a wireless communication apparatus that performs communication by adding synchronization data and error detection data, wherein the transmitter generates first error detection data for generating error detection data of transmission data transmitted in one slot. A generation step, a second error detection data generation step for dividing the transmission data transmitted in one slot into a plurality of data strings, and generating error detection data for each of the divided data strings, and a first error detection 1 slot from the error detection data, transmission data and first slot type data generated in the data generation step Transmission data to be transmitted in one slot from the error detection data, the transmission data, and the second slot type data generated in the first frame generation step for generating the transmission data string to be transmitted, and the second error detection data generation step. A second frame generation step for generating a sequence, a control data frame generation step for generating a transmission data sequence including control data and third slot type data, and a transmission data sequence generated in the first frame generation step A control step for selecting and transmitting either the transmission data sequence generated in the second frame generation step or the transmission data sequence generated in the control data frame generation step, and the transmission data sequence generated in the first frame generation step And the transmission data sequence generated in the second frame generation step and the control data frame generation step. And a transmission step for transmitting any of the transmission data sequences generated in step (b), and in the receiver, a slot type determination step for determining a slot type based on the first, second and third slot type data; A first error detection step for detecting an error in the received voice data received in one slot, and the received voice data received in one slot is divided into a plurality of data strings and the respective errors of the divided data strings A first error detection step based on the determination result in the second error detection step for detecting the error, the third error detection step for detecting an error in the reception control data received in one slot, and the slot type determination step The received data is processed based on the error detection result detected in the step, or the error detection result detected in the second error detection step. And a control step for selecting whether to process the received data based on the error detection result detected in the third error detection step, based on the slot type. Communication in two data formats is possible, and the data length for error detection / correction for each divided data is the same as the data length for error detection / correction for undivided data The length of the transmission data plus the error detection / correction data is shorter when the data is sent without being divided than when the data is divided and sent. In the slot to be transmitted, an unused portion can be created in the data in the slot, and this unused portion can be used as a control data field for transmitting control data such as disconnection. , Data format can be switched periodically, control data and communication data can be multiplexed and communicated, and when data is divided and sent, it is possible to reduce the number of data discarded when a data abnormality is detected At the same time, there is no need to send control data every time during communication, and when there is no need to send control data, it is possible to reduce the transmission timing of idle data indicating that there is no control data sent in the control data portion. This provides an advantageous effect that wasteful transmission can be reduced.

  Further, by indicating that the first and second slot type data are slots of audio data and the third slot type data is a slot of control data, the audio data and control data are the same slot. It is possible to obtain an advantageous effect that it becomes possible to transmit data by using the

  Furthermore, in the transmission data sequence generated in the second frame generation step, the audio data is divided into four, so that it is possible to reduce the number of data discarded when data abnormality is detected. Is obtained.

  Further, a wireless communication method in a wireless communication apparatus, which includes a transmitter and a receiver that perform communication using time division multiplexing, and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot In the transmitter, a first error detection data generation step for generating error detection data of transmission voice data transmitted in one slot, and transmission voice data transmitted in one slot into a plurality of data strings. A second error detection data generation step for generating the error detection data of each of the divided and divided data strings, and a third error detection data generation for generating error detection data of the transmission control data transmitted in one slot Error detection data, transmission data and voice data generated in the steps, first and third error detection data generation steps. Generated in a first frame generation step for generating a transmission data sequence to be transmitted in one slot from the first format type data indicating that the data is not divided, and in a second and third error detection data generation step. A second frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data, the transmission data, and the second format type data indicating that the audio data is divided, and a first frame generation A control step of selecting and transmitting either the transmission data sequence generated in the step or the transmission data sequence generated in the second frame generation step, and the transmission data sequence generated in the first frame generation step or the first A transmission step of transmitting the transmission data sequence generated in the frame generation step of 2, and in the receiver, A format judgment data separation step for judging whether the format type is first or second and separating the received data according to the judgment result of the first or second, and detecting an error in the received voice data received in one slot A first error detection step, a received error data received in one slot is divided into a plurality of data strings, a second error detection step for detecting each error in the divided data strings, and one slot Error detection results detected in the first and third error detection steps according to the third error detection step for detecting an error in the received reception control data and the format type determination result in the format determination data separation step Process the received data based on the error detection result detected in the second and third error detection steps And a control step for selecting whether to process the received data on the basis of the data, communication in two data formats is possible based on the slot type, and error detection / If the data length for error correction and the data length for error detection / correction for undivided data are the same, the length of the transmission data plus the data for error detection / correction is divided and sent. Compared to the case, sending data without dividing it becomes shorter, and in the slot that transmits data without dividing data, an unused part can be created in the data in the slot, and this unused part is cut off, etc. It can be used as a control data field to transmit control data, and the data format can be switched as needed to multiplex and transmit control data and communication data. When data is divided and sent, the number of data discarded when it is detected that data is abnormal can be reduced, and it is not necessary to send control data every time during communication. When there is no need to send data, it is possible to reduce the idle data transmission trigger indicating that there is no control data transmitted in the control data portion, and it is possible to obtain an advantageous effect that wasteful transmission can be reduced.

  Further, the error detection data of the transmission control data is not generated in the third error detection data generation step, and the transmission control data is not included in the transmission data sequence in the second frame generation step, and the third error detection data generation is performed. By not using the error detection data generated in the step for the generation of the transmission data string, it is possible to reduce the transmission timing of idle data indicating that there is no control data transmitted in the control data portion, and useless transmission The advantageous effect that it can be reduced is obtained.

  In the present invention, even if a reception error is detected, it is not necessary to discard all received data in the slot, so that information loss due to the reception error is small, and control data transmission other than communication data during communication is used. For the purpose of providing a wireless communication device that suppresses the decrease in effective communication rate, the data sequence sent in one slot is divided into a plurality of formats, and each has error correction / detection data (error detection data), Communicating using two formats of error correction / detection data (error detection data) without dividing the data string sent in one slot, and switching between the two formats This was realized by providing a part for transmitting control data other than communication data in one of the two formats.

  A first invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing method, and includes synchronization data and error detection data in transmission data transmitted in one slot. A wireless communication apparatus that performs additional communication, and a transmitter includes a first error detection data generation unit that generates error detection data of transmission data transmitted in one slot, and transmission data transmitted in one slot Is divided into a plurality of data strings, and a second error detection data generating unit that generates error detection data of each of the divided data strings, an error detection data generated by the first error detection data generating unit, and transmission A first frame generation unit that generates a transmission data string to be transmitted in one slot from the data, and error detection data and transmission data generated by the second error detection data generation unit. A second frame generation unit that generates a transmission data sequence to be transmitted in one slot from the transmission unit, and a transmission data sequence generated by the first frame generation unit or a transmission data sequence generated by the second frame generation unit And a first slot timing measurement unit that counts a predetermined period, and a control unit that controls the whole, and the control unit has a first frame generation unit at a period determined by the slot timing measurement unit Either the transmission data sequence generated in step 1 or the transmission data sequence generated by the second frame generation unit is selected and sent to the transmission unit, and the receiver detects an error in the reception data received in one slot. A first error detection unit that divides received data received in one slot into a plurality of data strings, and a second error detection unit that detects respective errors in the divided data strings; It has a second slot timing measurement unit that counts a predetermined cycle and a control unit that controls the whole, and the control unit detects an error detected by the first error detection unit at a cycle determined by the slot timing measurement unit. Whether to process the received data based on the detection result or to process the received data based on the error detection result detected by the second error detection unit is selected. Therefore, it is possible to determine whether or not the data is normal data, and it is possible to reduce the number of data to be discarded when data abnormality is detected.

  A second invention made to solve the above-described problem is that transmission data is generated by adding control data to the transmission data sequence generated by the first frame generation unit or the transmission data sequence generated by the second frame generation unit. Idle data indicating that there is no control data sent in the control data part when there is no need to send control data every time during communication, and there is no need to send control data. Therefore, the transmission opportunity can be reduced, and unnecessary transmission can be reduced.

A third aspect of the invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing method, and controls whether transmission data transmitted in one slot is a slot of audio data. A wireless communication apparatus that performs communication by adding slot type data indicating a slot type of data slot, synchronization data, and error detection data, and a transmitter transmits error detection data of transmission data transmitted in one slot A first error detection data generation unit for generating, and a second error detection data generation for dividing the transmission data transmitted in one slot into a plurality of data strings and generating error detection data for each of the divided data strings Unit, the error detection data generated by the first error detection data generation unit, the transmission data, and the first slot type data are transmitted in one slot. A transmission data sequence to be transmitted in one slot from the error detection data, the transmission data, and the second slot type data generated by the first frame generation unit that generates the transmission data sequence, the second error detection data generation unit, A second frame generation unit to generate, a control data frame generation unit to generate a transmission data sequence including control data and third slot type data, a transmission data sequence generated by the first frame generation unit, and a second A transmission unit that transmits one of the transmission data sequence generated by the frame generation unit and the transmission data sequence generated by the control data frame generation unit, and a control unit that controls the whole. Select one of the transmission data sequence generated by the frame generation unit, the transmission data sequence generated by the second frame generation unit, and the transmission data sequence generated by the control data frame generation unit The receiver detects the error of the received voice data received in one slot, and a slot type discriminating unit that discriminates the slot type based on the first, second, and third slot type data. A first error detection unit that divides received voice data received in one slot into a plurality of data strings, and a second error detection unit that detects each error in the divided data strings, and one slot A third error detection unit that detects an error in the received reception control data, and a control unit that controls the whole; the control unit determines whether the first error is based on a determination result in the slot type determination unit; The received data is processed based on the error detection result detected by the detection unit, the received data is processed based on the error detection result detected by the second error detection unit, or the third error detection unit Detected by Based on the error detection result, it is decided whether to process the received data, communication in two data formats is possible based on the slot type, and for each divided data If the error detection / correction data length is the same as the error detection / correction data length for undivided data, the length of the transmission data plus the error detection / correction data is Compared with the case where data is divided and sent, it is shorter when data is sent without being divided. In the slot that transmits data without dividing data, an unused part can be created in the data in the slot. Can be used as a control data field for transmitting control data such as disconnection, periodically switching the data format, and multiplexing the control data and communication data. When data is divided and sent, the number of data discarded when it is detected that data is abnormal can be reduced, and it is not necessary to send control data every time during communication. When there is no need to send data, it is possible to reduce the idle data transmission trigger indicating that there is no control data sent in the control data portion, and to reduce wasteful transmission.

  A fourth invention made to solve the above-mentioned problems shows that the first and second slot type data are slots of audio data, and that the third slot type data is a slot of control data. This has the effect of being able to transmit audio data and control data in the same slot.

  The fifth invention made to solve the above problem is that the transmission data sequence generated by the second frame generation unit divides the audio data into four parts, and when a data abnormality is detected. This has the effect of reducing the number of discarded data.

A sixth invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing method, and includes synchronization data and error detection data in transmission data transmitted in one slot. A wireless communication apparatus that performs additional communication, and a transmitter includes a first error detection data generation unit that generates error detection data of transmission voice data transmitted in one slot, and a transmission that is transmitted in one slot. A second error detection data generation unit that divides audio data into a plurality of data strings and generates error detection data of each of the divided data strings, and generates error detection data of transmission control data transmitted in one slot The error detection data generated by the third error detection data generation unit, the first and third error detection data generation units, the transmission data, and the audio data are divided. A first frame generation unit that generates a transmission data sequence to be transmitted in one slot from first format type data indicating that there is no error, and error detection data generated by the second and third error detection data generation units, A second frame generation unit that generates a transmission data string to be transmitted in one slot from transmission data and second format type data indicating that audio data is divided, and transmission generated by the first frame generation unit A transmission unit that transmits the data sequence or the transmission data sequence generated by the second frame generation unit, and a control unit that controls the whole, and the control unit transmits the transmission data sequence generated by the first frame generation unit Or the transmission data sequence generated by the second frame generation unit and sends it to the transmission unit, and the receiver determines whether the format type is first or second. A format determination data separation unit that separates reception data according to the determination result of the first or second, a first error detection unit that detects an error in reception audio data received in one slot, and reception in one slot A second error detector that divides the received audio data into a plurality of data strings and detects an error in each of the divided data strings, and a third that detects an error in the reception control data received in one slot The error detection unit and the control unit that controls the whole, and the control unit detects errors detected by the first and third error detection units according to the format type determination result in the format determination data separation unit. Selecting whether to process the received data based on the detection result or whether to process the received data based on the error detection results detected by the second and third error detection units; Based on the slot type, communication in two data formats is possible, error detection / correction data length for each divided data and error detection for undivided data When the data length for correction is the same, the length of the transmission data plus the data for error detection / correction is shorter when sending the data without dividing it than when sending the divided data. Therefore, in a slot that transmits data without dividing the data, an unused part can be created in the data in the slot, and this unused part can be used as a control data field for transmitting control data such as disconnection. The data format can be switched at any time, the control data and communication data can be multiplexed and communicated. In this case, it is possible to reduce the number of data to be discarded, and it is not necessary to send control data every time during communication, and control data sent in the control data portion when there is no need to send control data. It is possible to reduce the idle data transmission trigger indicating that there is no data, and to reduce unnecessary transmission.

  In a seventh invention made to solve the above-described problem, the third error detection data generation unit does not generate error detection data of transmission control data, and the second frame generation unit converts transmission control data to transmission data. The error detection data generated by the third error detection data generation unit is not used for generation of the transmission data string, and there is no control data sent in the control data portion. It is possible to reduce the transmission trigger of idle data indicating “” and to reduce unnecessary transmission.

An eighth invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing method, and includes synchronization data and error detection data in transmission data transmitted in one slot. A wireless communication method in a wireless communication apparatus for performing additional communication, wherein a transmitter includes a first error detection data generation step for generating error detection data of transmission data transmitted in one slot, and a slot. The transmission data to be transmitted is divided into a plurality of data strings and generated in the second error detection data generation step and the first error detection data generation step for generating the respective error detection data of the divided data strings. A first frame generation step for generating a transmission data string to be transmitted in one slot from error detection data and transmission data; and a second error A second frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data and the transmission data generated in the knowledge data generation step, a first slot timing measurement step for counting a predetermined period, and a slot A control step of selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step at a cycle determined in the timing measurement step; An error of received data received in one slot in the receiver, the transmission step transmitting the transmission data sequence generated in one frame generation step or the transmission data sequence generated in the second frame generation step The first error detection step for detecting the error and the received data received in one slot are duplicated. And a period determined by a second error timing step for detecting each error of the divided data string, a second slot timing measuring step for counting a predetermined period, and a slot timing measuring step. Select whether to process the received data based on the error detection result detected in the first error detection step or to process the received data based on the error detection result detected in the second error detection step It is possible to determine whether or not each divided data is normal data, and to reduce the number of data to be discarded when a data abnormality is detected. It has the action and effect.

  A ninth aspect of the invention made to solve the above-described problem is that transmission data is generated by adding control data to the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step. Idle data indicating that there is no control data sent in the control data part when there is no need to send control data every time during communication, and there is no need to send control data. Therefore, the transmission opportunity can be reduced, and unnecessary transmission can be reduced.

A tenth aspect of the invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing system, and controls whether transmission data transmitted in one slot is a slot of audio data. A wireless communication method in a wireless communication apparatus that performs communication by adding slot type data indicating a slot type of a data slot, synchronization data, and error detection data, and in the transmitter, transmission data transmitted in one slot A first error detection data generation step for generating the error detection data of the second, and a second of generating the error detection data for each of the divided data strings while dividing the transmission data transmitted in one slot into a plurality of data strings Error detection data generation step, error detection data and transmission data generated in the first error detection data generation step A first frame generation step of generating a transmission data string to be transmitted in one slot from one slot type data, an error detection data, a transmission data and a second slot type generated in a second error detection data generation step A second frame generation step for generating a transmission data sequence to be transmitted in one slot from data, a control data frame generation step for generating a transmission data sequence including control data and third slot type data, A control step of selecting and transmitting any of the transmission data sequence generated in the frame generation step, the transmission data sequence generated in the second frame generation step, and the transmission data sequence generated in the control data frame generation step; The transmission data sequence generated at the frame generation step and the transmission data generated at the second frame generation step. And a transmission step of transmitting either the data sequence or the transmission data sequence generated in the control data frame generation step. In the receiver, the slot type is determined based on the first, second, and third slot type data. Slot type discrimination step for discriminating, first error detection step for detecting an error of received voice data received in one slot, and received voice data received in one slot divided into a plurality of data strings and divided The second error detection step for detecting each error of the received data string, the third error detection step for detecting an error in the reception control data received in one slot, and the determination result in the slot type determination step Based on the error detection result detected in the first error detection step, the received data is processed or the second error is detected. A control step for selecting whether to process the received data based on the error detection result detected in the detection step or to process the received data based on the error detection result detected in the third error detection step; Based on the slot type, communication in two data formats is possible, and the data length for error detection / correction for each divided data and the data that is not divided When the error detection / correction data length is the same, the length of the transmission data plus the error detection / correction data is sent without dividing the data compared to when the data is divided and sent. In the slot that transmits data without dividing the data, an unused part can be created in the data in the slot, and control data such as cutting this unused part It can be used as a field for control data to be transmitted. Data format can be switched periodically, communication can be performed by multiplexing control data and communication data. When data is divided and sent, it is discarded when a data error is detected. It is possible to reduce the number of data to be transmitted, and there is no need to send control data every time during communication, and when there is no need to send control data, there is no control data sent in the control data portion. It is possible to reduce the transmission timing of idle data to be shown, and it is possible to reduce useless transmission.

  In an eleventh aspect of the invention made to solve the above problem, the first and second slot type data indicate that the slot is a voice data slot, and the third slot type data indicates that the slot is a control data slot. This has the effect of being able to transmit audio data and control data in the same slot.

  In a twelfth aspect of the invention made to solve the above-mentioned problem, in the transmission data sequence generated in the second frame generation step, the audio data is divided into four, and when it is detected that the data is abnormal. This has the effect of reducing the number of discarded data.

A thirteenth invention made to solve the above problems comprises a transmitter and a receiver that perform communication using a time division multiplexing method, and includes synchronization data and error detection data in transmission data transmitted in one slot. A wireless communication method in a wireless communication apparatus for performing additional communication, wherein a transmitter includes a first error detection data generation step for generating error detection data of transmission voice data transmitted in one slot, and one slot A second error detection data generation step for generating the error detection data of each of the divided data strings and the transmission control data transmitted in one slot; Generated by a third error detection data generation step for generating error detection data, and first and third error detection data generation steps. A first frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data, the transmission data, and the first format type data indicating that the audio data is not divided; A second frame for generating a transmission data string to be transmitted in one slot from the error detection data generated in the error detection data generation step, second format type data indicating that transmission data and audio data are divided A generation step, a control step of selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step, and a first frame generation step The transmission data sequence generated in step 2 or the transmission data sequence generated in the second frame generation step is transmitted. A format determination data separation step for determining whether the format type is first or second and separating the received data according to the first or second determination result. A first error detection step for detecting an error in the received voice data received in the slot, and dividing the received voice data received in one slot into a plurality of data strings and detecting each error in the divided data strings The first error detection step, the third error detection step for detecting an error in the reception control data received in one slot, and the format type determination result in the format determination data separation step. The received data is processed based on the error detection result detected in the error detection step 3 or the second and third errors are detected. -It has a control step that selects whether to process the received data based on the error detection result detected in the detection step, and communication in two data formats is possible based on the slot type If the data length for error detection / correction for each divided data is the same as the data length for error detection / correction for data that is not divided, the transmission data and error detection / correction data length are the same. The length of the data added is shorter when the data is sent without being divided than when the data is divided and sent. In the slot that transmits the data without dividing the data, the length of the data in the slot is reduced. An unused part can be created, and this unused part can be used as a control data field for transmitting control data such as disconnection. The control data and communication data can be multiplexed to communicate, and when data is divided and sent, it is possible to reduce the number of data to be discarded when a data abnormality is detected, and to communicate When there is no need to send control data every time, and there is no need to send control data, it is possible to reduce idle data transmission triggers indicating that there is no control data sent in the control data part, and wasteful transmission It has the effect | action and effect that can be decreased.

  In a fourteenth aspect of the invention made to solve the above problem, the error detection data of the transmission control data is not generated in the third error detection data generation step, and the transmission control data is transmitted in the second frame generation step. The error detection data generated in the third error detection data generation step is not used for the generation of the transmission data sequence, and there is no control data sent in the control data portion. It is possible to reduce the transmission trigger of idle data indicating “” and to reduce unnecessary transmission.

(Embodiment 1)
FIG. 1A is a block diagram showing a transmitter constituting the wireless communication apparatus according to Embodiment 1 of the present invention, and FIG. 1B shows a receiver constituting the wireless communication apparatus according to Embodiment 1 of the present invention. FIG.

  In FIG. 1A, 100 is a transmitter, 101 is a microphone for inputting an audio signal, 102 is an audio processing unit that samples an analog audio signal and performs digital conversion, 103 is a first changeover switch, and 104 is digital conversion. A first frame generation unit 105 for generating a transmission data string to be transmitted when the audio signal is transmitted without being divided within the slot, and 105 when the digitally converted audio signal is transmitted without being divided within the slot A first CRC generation unit (error detection data generation unit) 106 that generates CRC data for error detection (error detection data) to be added to the audio data sent to the audio data, 106 divides the digitally converted audio signal within the slot A second frame generation unit 107 for generating a transmission data string to be transmitted in the case of transmitting the digital signal in the slot A second CRC generation unit (error detection data generation unit) for generating CRC data for error detection (error detection data) to be added to the audio data to be transmitted in the case of split transmission, 108 is a second selector switch, 109 is a transmission unit that converts transmission data into a wireless transmission signal, 110 is an antenna that transmits a wireless signal, and 111 is a slot timing measurement that measures the timing of whether a voice signal is divided and sent without being divided. , 112 is an operation unit for inputting operations such as call start and disconnection, and 120 is a control unit for controlling the entire transmitter 100.

In FIG. 1B, 200 is a receiver, 201 is a speaker that outputs an audio signal, 202 is an audio processing unit that converts audio data of the demodulated received signal into an analog signal, 208 is a first changeover switch, 204 Is a first frame processing unit that processes a reception data sequence of a transmission signal that is transmitted without dividing the audio signal within the slot, and 205 is a reception data sequence of the transmission signal that is transmitted without dividing the audio signal within the slot. A first CRC determination unit (error detection unit) 206 for determining whether or not there is a reception error from the CRC data of the second frame for processing the reception data string of the transmission signal transmitted by dividing the audio signal in the slot The processing unit 207 is a second CRC determination unit (E) that determines whether there is a reception error from the CRC data of the reception data string of the transmission signal transmitted by dividing the audio signal in the slot. -Detection unit), 203 is a second changeover switch, 209 is a reception unit that demodulates the received radio signal, 210 is an antenna that transmits the radio signal, and 211 receives a transmission signal generated from the divided audio signal A slot timing measuring unit 220 that measures the timing of a slot that receives a transmission signal generated from a slot or a voice signal that is not divided, and a control unit 220 that controls the entire receiver 200.

  FIGS. 2A and 2B are format diagrams showing a data format used for communication in the wireless communication apparatus of FIG. 1, and show a sequence of data transmitted and received in one slot. FIG. 2 (a) shows data format 1 used in a slot for transmitting and receiving audio data without dividing it. Control data for transmitting and receiving commands such as synchronization data for bit synchronization and frame synchronization, and disconnection, and audio It consists of CRC data generated from data, control data and audio data. FIG. 2B shows a data format 2 used in a slot for dividing and transmitting audio data. The synchronization data for obtaining bit synchronization and frame synchronization, and divided first audio data (audio data 1). ), First CRC data generated from the first audio data (CRC data 1), divided second audio data (audio data 2), and second CRC data generated from the second audio data (CRC data 2).

  FIG. 3 is a timing diagram showing slot timings during communication in the wireless communication apparatus of FIG. In this embodiment, an example in which one frame is divided into two slots and two communications are multiplexed is shown, and an example is shown in which communications are performed in the preceding slot in the frame. 3, communication is performed in a slot having the data format in FIG. 2A in which the audio data is not divided in section A1, and in section B1, the data format slot in FIG. 2A and the data format in FIG. A state is shown in which communication is performed by alternately switching between slots.

  Hereinafter, an operation during communication between the transmitter 100 and the receiver 200 according to the present embodiment will be described with reference to FIGS. 1 to 3.

  First, the operation of the transmitter 100 will be described. During voice communication, the voice signal input to the microphone 101 of the transmitter 100 is sampled by the voice processing unit 102 and converted into a digital signal. The converted audio data is sent to the first frame generation unit 104 and the first CRC generation unit 105, or the second frame generation unit 106 and the second CRC generation unit 107 via the first changeover switch 103. Sent. When the audio data is sent to the first frame generation unit 104 and the first CRC generation unit 105, first, the first frame generation unit 104 uses the control data sent from the control unit 120 as the first CRC. The first CRC generation unit 105 performs CRC calculation using the control data transmitted from the first frame generation unit 104 and all the audio data transmitted in one slot, and transmits the result to the generation unit 105. CRC data to be added to the data is generated and output to the first frame generation unit 104. In the first frame generation unit 104, the synchronization data for synchronization and the control data such as disconnection sent from the control unit 120 are combined with the voice data and the CRC data input from the first CRC generation unit 105. A data string having the data format shown in FIG. 2A is generated and output.

  When the audio data is sent to the second frame generation unit 106 and the second CRC generation unit 107, the second CRC generation unit 107 first performs CRC calculation of the first half of the audio data transmitted in one slot. CRC data to be added to the transmission data is generated and output to the second frame generation unit 106, and then CRC calculation is performed on the second half of the audio data transmitted in one slot, and the CRC data is added to the transmission data. Data is generated and output to the second frame generation unit 106. The second frame generation unit 106 combines the synchronization data for synchronization with the audio data and the two CRC data input from the second CRC generation unit 107, and converts the data string in the data format shown in FIG. Generate and output.

  The transmission data string output from the first frame generation unit 104 or the second frame generation unit 106 is sent to the transmission unit 109 via the second changeover switch 108. The transmission unit 109 generates a radio signal modulated with the input data string and transmits it from the antenna 110. The slot timing measuring unit 111 counts the number of transmitted slots and determines whether the data format of the slot to be transmitted next is the format of FIG. 2A or the format of FIG. 120 is notified. For example, the slot timing measurement unit 111 is configured by a counter that is incremented every transmission of a slot, and the control unit 120 refers to the value of the slot timing measurement unit 111 that stores the format for the count number, and is an even number. If there is, the first changeover switch 103 and the second changeover switch 108 are switched so that transmission is performed in the format of FIG. 2A, and transmission is performed in the format of FIG.

  In addition, the control unit 120 performs overall control of the transmitter 100 and generates control data at the time of starting or disconnecting a call. When an operation for starting a call is performed by the operation unit 112 and detected by the control unit 120, the control unit 120 switches the first changeover switch 103 and the second changeover switch 108 to the first frame generation unit 104 side. Then, the first frame generation unit 104 is notified of control data instructing the start of a call. The first frame generation unit 104 generates a slot data string so that data instructing the start of a call is transmitted in the control data (see FIG. 2A) portion. In the next slot, the control unit 120 notifies the first frame generation unit 104 of control data for notifying the start of switching of the data format of the slot, and simultaneously instructs the slot timing measurement unit 111 to start measurement. The first frame generation unit 104 generates a slot data string so that data instructing switching start is transmitted in the control data (see FIG. 2A) portion. In addition, the slot timing measuring unit 111 thereafter transmits to the control unit 120 whether to transmit the next slot in the format of FIG. 2A or the format of FIG. The control unit 120 controls the first changeover switch 103 and the second changeover switch 108 according to the notified contents. The state of control at the start of the call is also shown in FIG. That is, in the section A1 in FIG. 3, the data after instructing the start of the call and the data instructing the start of switching are transmitted continuously using only the format of FIG. In B1, the format of FIG. 2A and the format of FIG. 2B are alternately transmitted. In addition, when the control unit 120 transmits the control data in the format shown in FIG. 2A, if there is no control data to be transmitted, the control unit 120 transmits idle data to the first frame generation unit 104. When the operation unit 112 is disconnected during communication and detected by the control unit 120, the control unit 120 waits until the timing of the slot to be transmitted in the format of FIG. The control data to be notified is notified to the first frame generation unit 104, and the process proceeds to the cutting operation.

  Next, the operation of the receiver 200 will be described. The radio signal received by the antenna 210 of the receiver 200 is demodulated by the receiving unit 209 and converted into a digital data string (received data string). The converted received data is sent to the first frame processing unit 204 or the second frame processing unit 206 via the first changeover switch 208. When the received data is sent to the first frame processing unit 204, the first frame processing unit 204 detects the bit string of the synchronization data of the received data, and transmits the following control data, audio data, and CRC data to the first frame processing unit 204. The data is sent to the CRC determination unit 205. The first CRC determination unit 205 performs CRC calculation of the control data and audio data, compares the received CRC data with each other, determines whether there is a reception error, and notifies the first frame processing unit 204 of the determination result. To do. When notified that there is no reception error, the first frame generation unit 204 outputs control data to the control unit 220 and audio data to the audio processing unit 202 via the second changeover switch 203, and there is a reception error. Is notified, the control data and the received data are discarded, and the mute data is output to the audio processing unit 202 via the second changeover switch 203.

  Further, when the received data is sent to the second frame processing unit 206, the second frame processing unit 206 detects the bit string of the synchronization data of the received data, and the divided audio data and the respective CRCs that follow are detected. The data is sent to the second CRC determination unit 207. The second CRC determination unit 207 performs CRC calculation on each of the divided audio data, compares it with each received CRC data, determines whether there is a reception error, and determines the determination result as the second frame. Notify the processing unit 206. The second frame processing unit 206 outputs the audio data to the audio processing unit 202 via the second changeover switch 203 when notified that there is no reception error for each divided audio data, When it is notified that there is a reception error, the reception data of the corresponding audio data part is discarded, and the mute data is output to the audio processing unit 202 via the changeover switch 203. The audio processing unit 202 converts the data string output from the first frame generation unit 204 or the second frame generation unit 206 sent via the second changeover switch 203 into an analog signal and converts the data into the speaker 201. The audio signal received from the speaker 201 is output.

  Further, the slot timing measuring unit 211 counts the number of received slots, and determines whether the data format of the next received slot is the format of FIG. 2A or the format of FIG. 220 is notified. For example, the slot timing measurement unit 211 includes a counter that is incremented every time a slot is received, and the control unit 220 refers to the value of the slot timing measurement unit 211. The first changeover switch 208 and the second changeover switch 203 are switched so that the first changeover signal 208 is received in the format 2 of FIG.

  The control unit 220 controls the entire receiver 200. In the state before the start of the call, the control unit 220 switches the first changeover switch 208 to the first frame processing unit 204 side and performs control so as to wait for a call start request from the transmitter. . When a call start request is sent from the transmitter 100 to the receiver 200 waiting for reception, a radio signal including control data for call start is demodulated by the receiving unit 209 and passed through the first changeover switch 208. To the first frame processing unit 204. The first frame processing unit 204 extracts control data, that is, a call start request, and notifies the control unit 220 of it. Upon receiving a call start request, the control unit 220 sets the second changeover switch 203 to the first frame processing unit 204 side, activates the voice processing unit 102, and prepares for reception. When a radio signal including a notification of switching start is transmitted from the transmitter 100, the radio signal including control data for switching start is demodulated by the receiving unit 209 and passed through the first switch 208 as described above. To the first frame processing unit 204. The first frame processing unit 204 extracts control data, that is, a request to start switching, and notifies the control unit 220 of it. When the control unit 220 receives the request to start switching, the control unit 220 instructs the slot timing measurement unit 211 to start measurement, and the slot timing measurement unit 211 thereafter designates the next slot as shown in FIG. ) In the format 1 of FIG. 2B or in the format 2 of FIG. 2B, the control unit 220 notifies the first changeover switch 208 according to the notified contents. And the second selector switch 203 is controlled. In the case of the example of FIG. 3, the receiver 200 uses only the format 1 of FIG. 2A in the section A1 of FIG. The slot timing measurement unit 211 instructs to alternately receive the format 1 in FIG. 2A and the format 2 in FIG. The control unit 220 performs control so that both the first changeover switch 208 and the second changeover switch 203 are switched to the first frame processing unit 204 side and the second frame processing unit 206 side for each slot. In addition, when control data notifying disconnection is received during communication and notified to the control unit 220, the control unit 220 performs control to stop the audio processing unit 202 and the slot timing measurement unit 211, and performs the next communication. In preparation for the start, control is performed so that the first changeover switch 208 is connected to the first frame processing unit 204 side.

  As described above, according to the present embodiment, the transmitter 100 and the receiver 200 communicate using time division multiplexing, and synchronization data and error detection data are added to transmission data transmitted in one slot. The transmitter 100 includes a first error detection data generation unit 105 that generates error detection data of transmission data transmitted in one slot, and a transmission transmitted in one slot. A second error detection data generation unit 107 that divides the data into a plurality of data strings and generates error detection data for each of the divided data strings, and an error detection generated by the first error detection data generation unit 105 A first frame generation unit 104 that generates a transmission data sequence to be transmitted in one slot from data and transmission data, and a second error detection data generation unit 107 A second frame generation unit 106 that generates a transmission data sequence to be transmitted in one slot from the generated error detection data and transmission data, and a transmission data sequence generated by the first frame generation unit 104 or a second frame The transmission unit 109 that transmits the transmission data sequence generated by the generation unit 106, a first slot timing measurement unit 111 that counts a predetermined period, and a control unit 120 that controls the whole, the control unit 120 includes a slot The transmission unit 109 selects either the transmission data sequence generated by the first frame generation unit 104 or the transmission data sequence generated by the second frame generation unit 106 at a cycle determined by the timing measurement unit 111. Transmitting and receiving device 200 receives first error detection unit 205 for detecting an error in received data received in one slot and received in one slot The received data is divided into a plurality of data strings and each of the divided data strings is detected with a second error detection unit 207, a second slot timing measurement unit 211 that counts a predetermined period, and the whole Whether the control unit 220 processes the received data based on the error detection result detected by the first error detection unit 205 at a cycle determined by the slot timing measurement unit 211. Based on the error detection result detected by the second error detection unit 207, it is determined whether to process the received data, and it is possible to determine whether or not each divided data is normal data. When the data abnormality is detected, the number of data discarded can be reduced.

  The transmission data sequence is generated by adding control data to the transmission data sequence generated by the first frame generation unit 104 or the transmission data sequence generated by the second frame generation unit 106. During communication, when there is no need to send control data every time, and there is no need to send control data, it is possible to reduce idle data transmission triggers indicating that there is no control data sent in the control data portion, which is useless. Transmission can be reduced.

(Embodiment 2)
FIG. 4 (a) is a block diagram showing a transmitter constituting the wireless communication apparatus according to Embodiment 2 of the present invention, and FIG. 4 (b) is a reception constituting the wireless communication apparatus according to Embodiment 2 of the present invention. It is a block diagram which shows a machine.

  In FIG. 4, a microphone 101, an audio processing unit 102, a first changeover switch 103, a first CRC generation unit 105, a second CRC generation unit 107, a second changeover switch 108, a transmission unit 109, an antenna 110, an operation Unit 112, speaker 201, audio processing unit 202, second changeover switch 203, first CRC determination unit 205, second CRC determination unit 207, first changeover switch 208, reception unit 209, and antenna 210 are shown in FIG. Therefore, the same reference numerals are given and description thereof is omitted.

In FIG. 4A, reference numeral 300 denotes a transmitter, and 301 denotes a first transmission data string that is sent when an audio signal digitally converted in a slot for transmitting audio data is transmitted without being divided in the slot. An audio frame generation unit 302 is a second audio frame generation unit 303 that generates a transmission data sequence to be transmitted when an audio signal digitally converted in a slot for transmitting audio data is divided and transmitted in the slot. A control data frame generation unit 304 generates a transmission data sequence including control data in a slot for transmitting data, and 304 generates CRC data (error detection data) for error detection of the data sequence transmitted in the slot for transmitting control data. A third CRC generator, 305 is a third changeover switch, and 320 is a control for controlling the entire transmitter 300. It is a part.

  In FIG. 4B, reference numeral 400 denotes a receiver, 401 denotes a first audio frame processing unit that performs processing of a reception data string of a transmission signal transmitted without dividing the audio signal within the slot, and 402 denotes an audio signal in the slot. A second audio frame processing unit for processing a reception data sequence of a transmission signal divided and transmitted within the control frame, 403 for a control frame processing unit for processing a reception data sequence of a control data frame, and 404 for reception including control data A third CRC determination unit (error detection unit) that performs data error detection, 405 a slot type determination unit that determines whether a received signal is a control frame or a voice frame, and distributes a received data string, and 420 a receiver It is a control part which controls 400 whole.

  FIGS. 5A, 5B, and 5C are format diagrams showing a data format used for communication in the wireless communication apparatus of FIG. 4, and show a string of data transmitted and received in one slot. FIG. 5 (a) shows format 3 used in a slot for transmitting and receiving audio data without dividing it, slot data indicating that the synchronization data for bit synchronization and frame synchronization, and the data in the slot is audio data. , Voice data, and CRC data generated from the voice data. FIG. 5B shows format 4 used in a slot that divides and transmits audio data, and shows that synchronization data for bit synchronization and frame synchronization and that data in the slot is audio data. Type, divided first audio data (audio data 1), first CRC data (CRC data 1) generated from the first audio data, divided second audio data (audio data 2), Second CRC data (CRC data 2) generated from the second voice data, divided third voice data (voice data 3), and third CRC data (CRC) generated from the third voice data Data 3), divided fourth voice data (voice data 4), and fourth CRC data (CRC data 4) generated from the fourth voice data. FIG. 5C shows format 5 used in a slot for transmitting / receiving control data. The slot type indicates that the synchronization data for obtaining bit synchronization / frame synchronization and the data in the slot are control data. , Control data, and CRC data generated from the control data.

  FIG. 6 is a timing chart showing the slot timing during communication in the wireless communication apparatus of FIG. In the present embodiment, an example is shown in which one frame is divided into two slots and two communications are multiplexed, and an example is shown in which communications are performed in the preceding slot of the two slots. In FIG. 6, communication is performed in the slot of format 3 in FIG. 5A in which the audio data is not divided in section A2, and communication in the slot of format 4 in FIG. 5B is performed in section B2. 5 shows a state in which a control signal for switching the format of the audio data is sent in the format 5 of FIG.

  The operation during communication between the transmitter 300 and the receiver 400 of the wireless communication apparatus according to the second embodiment of the present invention will be described below with reference to FIGS.

First, the operation of the transmitter 300 will be described. During voice communication, the voice signal input to the microphone 101 of the transmitter 300 is sampled by the voice processing unit 102 and converted into a digital signal. The converted audio data is sent to the first audio frame generator 301 and the first CRC generator 105 or the second audio frame generator 302 and the second CRC generator 107 via the first changeover switch 103. Sent to. When audio data is sent to the first audio frame generation unit 301 and the first CRC generation unit 105, the first CRC generation unit 105 performs CRC calculation using all audio data transmitted in one slot. , CRC data to be added to the transmission data is generated and output to the first audio frame generation unit 301. The first audio frame generation unit 301 combines the synchronization data for synchronization and the slot type indicating the audio data with the audio data and CRC data input from the first CRC generation unit in FIG. A data string of the format 3 shown is generated and output.

  Further, when the audio data is sent to the second audio frame generation unit 302 and the second CRC generation unit 107, the second CRC generation unit 107 is 1/4 data of the audio data transmitted in one slot. CRC calculation is performed for each length, and four CRC data to be added to the transmission data are generated and output to the second audio frame generation unit 302. In the second audio frame generation unit 302, the synchronization data for synchronization and the slot type indicating the audio data are combined with the audio data and the four CRC data input from the second CRC generation unit 107 in FIG. A data string of format 4 shown in b) is generated and output. The data string output from the first audio frame generation unit 301 or the second audio frame generation unit 302 is sent to the transmission unit 109 via the second changeover switch 108 and the third changeover switch 305. The transmission unit 109 generates a radio signal modulated with the input data string and transmits it from the antenna 110.

  When transmitting control data, the control data generated by the control unit 320 is sent to the control data frame generation unit 303 and the third CRC generation unit 304, and the third CRC generation unit 304 uses the control data. CRC calculation is performed, CRC data to be added to the transmission data is generated, and output to the control data frame generation unit 303. The control data frame generation unit 303 combines the control data and the CRC data input from the third CRC generation unit 304 with the synchronization data for synchronization and the slot type indicating the control data, as shown in FIG. A data string of format 5 is generated and output. The control unit 320 controls the entire transmitter 300, and determines whether to transmit the control data and voice data at the start of the call or disconnection in a divided format or not. Generate control data to be notified. When transmitting the control data, the control unit 320 generates control data, outputs a data string to the control data frame generation unit 303 and the third CRC generation unit 304, and outputs the third data. Control is performed so that the changeover switch 305 is switched to the control data frame generation unit 303 side.

  Next, the operation of the receiver 400 will be described. A radio signal received by the antenna 210 of the receiver 400 is demodulated by the receiving unit 209 and converted into a digital data string. The converted reception data is sent to the slot type determination unit 405. The slot type discriminating unit 405 detects the synchronization data of the received data, determines the slot type of the received data that follows, and in the case of voice data, the voice data and CRC data of the received data are converted to the first changeover switch 108 side. In the case of control data, the control data and CRC data are output to the control frame processing unit 403 side, and at the same time, the control unit 420 is notified that the control data has been received.

When the received data is control data, the control frame processing unit 403 sends the control data and CRC data to the third CRC determination unit 404, and the third CRC determination unit 404 performs CRC calculation of the control data, It is compared with the CRC value of the received data to determine whether there is a reception error and outputs it to the control data frame processing unit 403. When notified that there is no reception error, the control data frame processing unit 403 notifies the control unit 420 of the control data portion of the received data, and when notified that there is a reception error, discards the received data. When control data is notified from the control frame processing unit 403, the control unit 420 analyzes the control data and performs control processing according to the control data contents. That is, if the control data is a notification for switching the format of the audio data, the first changeover switch 208 and the second changeover switch 203 are switched according to the notification content. If it is a notification of the end of the call, control is performed so that the voice processing unit 202 is stopped. Further, when the control unit 420 is notified that the control data has been received from the slot type determination unit 405,
The voice processing unit 202 is controlled to stop during the period in which the control data is received, and control is performed so that the received voice is muted during reception of the control data.

  If the received data is an audio signal, the received data is sent to the first audio frame processing unit 401 or the second audio frame processing unit 402 via the first changeover switch 208. When the received data is sent to the first audio frame processing unit 401, the first audio frame processing unit 401 sends the audio data and CRC data to the first CRC determination unit 205. The CRC determination unit 205 performs CRC calculation on the voice data, compares the received CRC data with the received CRC data, determines whether there is a reception error, and notifies the first voice frame processing unit 401 of the determination result. The first audio frame processing unit 401 outputs audio data to the audio processing unit 202 via the second changeover switch 203 when notified that there is no reception error, and when notified that there is a reception error, The received data is discarded, and the mute data is output to the audio processing unit 202 via the second changeover switch 203. When the received data is sent to the second audio frame processing unit 402, the second audio frame processing unit 402 sends the divided audio data and the respective CRC data to the second CRC determination unit 207. The second CRC determination unit 207 performs CRC calculation on each of the divided audio data, compares it with each received CRC data, determines whether there is a reception error, and determines the determination result as the second audio data. Notify the frame processing unit 402. The second audio frame processing unit 402 outputs the audio data to the audio processing unit 202 via the second changeover switch 203 when it is notified that there is no reception error for each divided audio data. When it is notified that there is a reception error, the received data of the corresponding divided audio data part is discarded, and the mute data is output to the audio processing unit 202 via the second changeover switch 203.

  Next, how the transmitter 300 and the receiver 400 communicate with each other will be described with reference to FIG. The example in FIG. 6 shows an example in which the format of the voice data is switched from the format 3 in FIG. 5A to the format 4 in FIG.

  First, audio data is transmitted from the transmitter 300 in the format 3 of FIG. 5A (section A2). Here, the transmitter 300 notifies that the format of the audio data is switched to the format 4 of FIG. 5B using the format 5 of FIG. Then, the audio data format is switched to the format 4 in FIG. 5B and transmission is performed (section B2). In the example shown in FIG. 6, when data is transmitted without dividing the audio data, one data string is transmitted in half the time of one frame. However, when the audio data is divided and transmitted. Transmits one data string using most of the time of one frame. That is, when audio data is divided and transmitted, it takes more time to transmit one data string than when audio data is transmitted without being divided. Therefore, when voice quality is important or when there is a sufficient amount of radio resources (when it is not necessary to increase the number of time-division multiplexing), a format in which audio data is divided is used, and there is no room for radio resources. When it is desired to increase the number of time-division multiplexes as much as possible, radio resources can be effectively used by managing the radio resources so as to use a format that does not divide audio data and switching the format.

As described above, according to the present embodiment, the transmitter 300 and the receiver 400 are configured to perform communication using the time division multiplexing method, and synchronization data and error detection data are added to transmission data transmitted in one slot. The transmitter 300 includes a first error detection data generation unit 105 that generates error detection data of transmission data transmitted in one slot, and a transmission transmitted in one slot. A second error detection data generation unit 107 that divides the data into a plurality of data strings and generates error detection data for each of the divided data strings, and an error detection generated by the first error detection data generation unit 105 A first audio frame generation unit 30 that generates a transmission data string to be transmitted in one slot from data, transmission data, and a first slot type indicating audio data. Second audio frame generation for generating a transmission data string to be transmitted in one slot from the error detection data generated by the second error detection data generation unit 107, the transmission data, and the second slot type indicating the audio data Unit 302, a control data frame generation unit 303 that generates a transmission data sequence including control data and a third slot type indicating control data, a transmission data sequence generated by first audio frame generation unit 301, and a second A transmission unit 109 that transmits one of the transmission data sequence generated by the voice frame generation unit 302 and the transmission data sequence generated by the control data frame generation unit 303, and a control unit 320 that controls the whole. The unit 320 includes a transmission data sequence generated by the first audio frame generation unit 301 and a transmission data sequence generated by the second audio frame generation unit 302. One of the transmission data sequences generated by the control data frame generation unit 303 is selected and transmitted to the transmission unit 109, and the receiver 400 determines the first, second, and third slot types. 405, a first error detection unit 205 that detects an error in the received voice data received in one slot, and the received voice data received in one slot is divided into a plurality of data strings and the divided data strings A second error detection unit 207 that detects each error, a third error detection unit 404 that detects an error in reception control data received in one slot, and a control unit 420 that controls the whole, The control unit 420 processes the received audio data based on the error detection result detected by the first error detection unit 205 based on the determination result by the slot type determination unit 405. Or processing the received voice data based on the error detection result detected by the second error detection unit 207 or processing the reception control data based on the error detection result detected by the third error detection unit 404 The communication in two data formats is possible based on the slot type, and the data length for error detection / correction for each divided data is not divided. If the data length for error detection / correction is the same for the data, the length of the transmission data plus the data for error detection / correction will divide the data compared to when sending the data separately. In the slot where data is transmitted without dividing the data, an unused part can be created in the data in the slot, and this unused part is cut off. It can be used as a field for control data to be transmitted. Data format can be switched periodically, communication can be performed by multiplexing control data and communication data. When data is divided and sent, it is discarded when a data error is detected. It is possible to reduce the number of data to be transmitted, and there is no need to send control data every time during communication, and when there is no need to send control data, there is no control data sent in the control data portion. The idle data transmission opportunity shown can be reduced, and unnecessary transmission can be reduced.

  Further, in the transmission data sequence generated by the second audio frame generation unit 302, the audio data is divided into four, and the number of data discarded when a data abnormality is detected can be reduced. It becomes.

  In the description of the second embodiment, the control data for notifying whether or not the audio data is divided is notified in the same slot as the audio data, and each slot type is distinguished in order to distinguish between the audio data and the control data. However, as another method for notifying whether or not the audio data is divided, there is a method of transmitting the control data in another slot. Hereinafter, a method for transmitting and receiving audio data and control data in different slots in Embodiment 2 will be described.

  FIG. 7 is an explanatory diagram showing a data format used in communication between the transmitter and the receiver according to Embodiment 2 of the present invention, and performs communication using a method of transmitting and receiving audio data and control data in different slots. In this case, a sequence of data transmitted and received in one slot is shown.

In FIG. 7, (a) is a format used in a slot for transmitting and receiving audio data without dividing it, and is composed of synchronization data for achieving bit synchronization frame synchronization, audio data, and CRC data generated from the audio data. The (B) is a format used in a slot for dividing and transmitting audio data, and is generated from synchronization data for bit synchronization frame synchronization, divided first audio data 1 and audio data 1. CRC data 1, divided second audio data 2, CRC data 2 generated from audio data 2, divided third audio data 3, CRC data 3 generated from audio data 3, divided first data 4 audio data 4 and CRC data 4 generated from the audio data 4. (C) is a format used in a slot for transmitting / receiving control data, and is composed of synchronization data for establishing bit synchronization frame synchronization, control data, and CRC data generated from the control data.

  FIG. 8 is an explanatory diagram showing slot timing during communication according to Embodiment 2 of the present invention. In this example, one frame is divided into two slots, and two communications are multiplexed. Audio data is communicated in the preceding slot of the two slots, and control data is transmitted in the rear slot. An example of communication is shown.

  In FIG. 8, communication is performed in the slot A in the format of FIG. 7A in which the audio data is not divided in section A, and communication is performed in the slot in the format of FIG. FIG. 5C shows a state in which a control signal for switching the audio data format is sent in the format of FIG.

  Hereinafter, the operation during communication between the transmitter and the receiver according to the second embodiment of the present invention will be described with reference to FIGS. 4, 7, and 8.

  When the transmitter 300 and the receiver 400 of FIG. 4 operate in the method of transmitting control data in another slot using the format of FIG. 7, the above-described description and the following operations are different.

  First, in the first audio frame generation unit 301 of the transmitter 300, the audio data, the CRC data input from the first CRC generation unit, and the synchronization data for synchronization are combined and the format shown in FIG. Generate and output a data string. Further, the second audio frame generation unit 302 combines the synchronization data and audio data for synchronization with the audio data and the four CRC data input from the second CRC generation unit 107, and the format shown in FIG. Generate and output the data string. The control data frame generation unit 303 combines the control data and the CRC data input from the third CRC generation unit 304 with the synchronization data for synchronization to generate a data string in the format shown in FIG. To do.

  The control unit 320 performs overall control of the transmitter 300 and notifies whether control data and voice data at the time of starting or disconnecting a call are divided and transmitted in a format or a format that is not divided. Data for control to be generated is generated. When transmitting the control data, the control unit 320 generates control data, outputs a data string to the control data frame generation unit 303 and the third CRC generation unit 304, and outputs the third data. Control is performed so that the changeover switch 305 is switched to the control data frame generation unit 303 side. Further, the control unit 320 generates control data so that the slot used for audio data communication and the slot used for transmission of control data are different, and controls each unit.

Next, the difference between the receivers 400 will be described. The slot type discriminating unit 405 distributes the received signal according to the received slot position. That is, in the standby state, all received data is processed as control data, the control data and CRC data are output to the control frame processing unit 403 side, and after shifting to the voice call state, the data received in the voice data slot is The voice data and CRC data of the received data are output to the first changeover switch 208 side, and the data received in the control data slot is output to the control frame processing unit 403 side. Note that the slot position for voice and the slot position for control data are notified in advance from the control unit 420 described later.

  In addition to the operations described above, the control unit 420 performs control to notify the slot type determination unit 405 of the control slot position and the voice slot position. That is, when control data instructing the start of a call is received in the standby state, the control unit 420 controls each unit of the receiver 400 to start receiving a slot for audio data instructed by the control data instructing the start of a call. At this time, the slot type discriminating unit 405 is notified of the voice slot and the control slot position. In addition, the control unit 420 controls each unit of the receiver 400 so that the reception slot is received even after the reception of the audio slot is started. In the above description, the control unit 420 operates to mute the received voice when receiving the control data while receiving the voice data. However, here, the control data can be received simultaneously with the voice data, and the control data can be controlled. The mute operation of the received voice at the time of data reception is not performed.

  Next, a state in which the transmitter 300 and the receiver 400 of Embodiment 2 perform voice communication in a slot different from the control slot will be described with reference to FIG.

  The example of FIG. 8 receives control data for starting a call, starts receiving a slot for voice based on the slot information for voice communication included in the control data for starting the call, and is in a state during a voice call. 5 shows an example of switching the audio data format from the format of FIG. 5A to the format of FIG. 5B.

  First, control data for notifying the start of a call is sent from the initial transmitter 300 in the format of FIG. This control data includes information for notifying the slot position for transmitting subsequent audio data and the format of the audio data. Receiving the call start control data, the receiver 400 starts receiving the slot notified by the control data, and starts control to process the received data as audio data in the format notified by the control data. . At this time, the receiver 400 continues to receive control slots. FIG. 8 shows an example in which the following voice data is instructed to be sent in the format shown in FIG. 7A in the call start control data. In section A following the control data, FIG. ) Audio data is being sent and received. Subsequently, the transmitter 300 uses the format shown in FIG. 6C to change the format of the audio data to the format shown in FIG. 7B in the same slot as the slot that transmitted the call start control data. In the section B following the frame in which the control data to be transmitted is transmitted and the control data for notifying the format change is transmitted, the audio data is transmitted and received in the format of FIG.

(Embodiment 3)
FIG. 9A is a block diagram showing a transmitter constituting the wireless communication apparatus according to the third embodiment of the present invention, and FIG. 9B is a reception constituting the wireless communication apparatus according to the third embodiment of the present invention. It is a block diagram which shows a machine.

  In FIG. 9, the microphone 101, the audio processing unit 102, the first changeover switch 103, the second changeover switch 108, the transmission unit 109, the antenna 110, the operation unit 112, the speaker 201, the audio processing unit 202, the reception unit 209, and the antenna Since 210 is the same as that in FIG. 1, the same reference numerals are given and description thereof is omitted.

In FIG. 9A, 500 is a transmitter, 501 is a first frame generation unit that generates a transmission data string to be transmitted when a digitally converted audio signal is transmitted without being divided in a slot, and 502 is a digital signal. A first CRC generation unit (error detection data generation unit) that generates CRC data for error detection (error detection data) to be added to audio data to be transmitted when the converted audio signal is transmitted without being divided in the slot 503, a second frame generation unit that generates a transmission data string to be transmitted when a digitally converted audio signal is divided and transmitted in a slot, and 504 divides the digitally converted audio signal in the slot. A second CRC generation unit 505 for generating CRC data for error detection to be added to the audio data sent when transmitting The third CRC generator for generating CRC data for error detection, 520 is a control unit that controls the entire transmitter 500.

  Also, in FIG. 9B, 600 is a receiver, 601 is the received signal is divided into control data related data and audio data related data and distributed, and further the audio data related data is distributed according to the format type. A format determination data separating unit 602 for performing the processing of the received data sequence of the transmission signal transmitted without dividing the audio signal in the slot, and 603 for not dividing the audio signal in the slot A first CRC determination unit (error detection unit) for determining whether or not there is a reception error from CRC data of the reception data string of the transmission signal transmitted to 604, and 604 is reception data of the transmission signal transmitted by dividing the audio signal within the slot A second audio frame processing unit 605 that performs sequence processing, CRC data of the received data sequence of the transmission signal transmitted by dividing the audio signal in the slot 2, a second CRC determination unit that determines whether there is a reception error, 606 is a control frame processing unit that processes a control data sequence, 607 is a third CRC determination unit that determines whether there is a reception error in control data, 608 A changeover switch 620 is a control unit that controls the entire receiver 600.

  FIGS. 10A and 10B are format diagrams showing a data format used for communication in the wireless communication apparatus of FIG. 9, and show a sequence of data transmitted and received in one slot. FIG. 10A shows a format used in a slot for transmitting / receiving audio data without dividing it, from synchronization data for bit synchronization / frame synchronization, control data for transmitting / receiving a command such as disconnection, and control data. It is composed of generated CRC data, audio data, and CRC data generated from the audio data. FIG. 10B shows a format used in a slot for transmitting and receiving audio data by dividing it. Control data and control data for transmitting and receiving commands such as synchronization data for bit synchronization and frame synchronization, and disconnection. CRC data generated from the first divided audio data (audio data 1), first CRC data generated from the first audio data (CRC data 1), divided second audio data ( Audio data 2), second CRC data (CRC data 2) generated from the second audio data, divided third audio data (audio data 3), and third data generated from the third audio data CRC data (CRC data 3), divided fourth voice data (voice data 4), and fourth CRC data (CRC data 4) generated from the fourth voice data Constructed.

  Hereinafter, an operation during communication between the transmitter 500 and the receiver 600 of the wireless communication apparatus in FIG. 9 will be described with reference to FIGS. 9 and 10.

  First, the operation of the transmitter 500 when audio data is transmitted in a format that does not divide (see FIG. 8A) will be described.

In this case, the control unit 520 performs control so that the first changeover switch 103 and the second changeover switch 108 are connected to the first frame generation unit 501 and the first CRC generation unit 502 side. During the voice communication, the voice signal input to the microphone 101 of the transmitter 500 is sampled and converted into a digital signal by the voice processing unit 102. The converted audio data is sent to the first frame generation unit 501 and the first CRC generation unit 502 via the first changeover switch 103, and the first CRC generation unit 502 outputs the audio data for each slot. CRC calculation is performed and sent to the first frame generation unit 501. Also, the control unit 520 sends control data to be added for each slot to the third CRC generation unit 505, reads the CRC result calculated by the third CRC generation unit 505, and controls the CRC of the control data together with the control data. The calculation result is sent to the first frame generation unit 501. The first frame generation unit 501 combines the transmitted control data, CRC data of the control data, audio data, CRC data of the audio data, and a format type indicating that the audio data is not divided, as shown in FIG. ) Format data string is generated, and the generated data string is output to the transmission unit 109 via the second switch 108. The transmission unit 109 converts the received data string into a radio signal and transmits the radio signal from the antenna 110.

  Next, the operation of the transmitter 500 when audio data is transmitted in a divided format (see FIG. 8B) will be described.

  In this case, the control unit 520 performs control to connect the first changeover switch 103 and the second changeover switch 108 to the second frame generation unit 503 and the second CRC generation unit 504 side. During the voice communication, the voice signal input to the microphone 101 of the transmitter 500 is sampled and converted into a digital signal by the voice processing unit 102. The converted audio data is sent to the second frame generation unit 503 and the second CRC generation unit 504 via the first changeover switch 103, and is sent to each slot in the second CRC generation unit 504. The audio data string is divided into four equal parts, each CRC calculation is performed, and the result is sent to the second frame generation unit 503. Also, the control unit 520 sends control data to be added for each slot to the third CRC generation unit 505, reads the CRC result calculated by the third CRC generation unit 505, and controls the CRC of the control data together with the control data. The calculation result is sent to the second frame generation unit 503. In the second frame generation unit 503, the received control data, CRC data of the control data, audio data, CRC data for each of the four equally divided audio data, and a format type indicating that the audio data are divided. A data string in the format of FIG. 10B is generated in combination, and the generated data string is output to the transmission unit 109 via the second changeover switch 108. The transmission unit 109 converts the received data string into a radio signal and transmits the radio signal from the antenna 110.

  The control data is used for notifying the start or disconnection of a call, but when there is no control data to be sent, idle data indicating that there is no control is sent instead of the control data.

  Next, the operation of the receiver 600 will be described. A radio signal received by the antenna 210 of the receiver 600 is demodulated by the receiving unit 209 and converted into a digital data string. The converted received data is sent to the format determination data separation unit 601. The format determination data separation unit 601 detects synchronization data, separates data strings, and sends control data and CRC data for control data to the control frame processing unit 606. Also, the format determination data separation unit 601 determines the format type. If the format type is not divided, the subsequent data is sent to the first audio frame processing unit 602, and the changeover switch 608 is set to the first audio frame. Control is performed so as to connect to the processing unit 602 side, and if the format type is divided, subsequent data is sent to the second audio frame processing unit 604, and the changeover switch 608 is set to the second audio frame processing unit 604 side. Control to connect.

  When the received data is sent to the first voice frame processing unit 602, the first voice frame processing unit 602 sends the voice data and CRC data to the first CRC determination unit 603. The first CRC determination unit 603 performs CRC calculation on the voice data, compares the received CRC data with the received CRC data, determines whether there is a reception error, and notifies the first voice frame processing unit 602 of the determination result. The first audio frame generation unit 602 outputs the audio data to the audio processing unit 202 via the changeover switch 608 when notified that there is no reception error, and receives the received data when notified that there is a reception error. The data for muting is discarded and output to the audio processing unit 202 via the changeover switch 608. The audio processing unit 202 converts the transmitted data into an analog signal and outputs it from the speaker 201.

  When the received data is sent to the second audio frame processing unit 604, the second audio frame processing unit 604 sends the divided audio data and the respective CRC data to the second CRC determination unit 605. The second CRC determination unit 605 performs a CRC calculation on each divided voice data, compares it with each received CRC data, determines whether there is a reception error, and determines the determination result as the second voice data. The frame processing unit 604 is notified. The second audio frame processing unit 604 outputs the audio data to the audio processing unit 202 via the changeover switch 608 when it is notified that there is no reception error for each divided audio data, and receives the reception error. When notified of the presence, the received data of the corresponding audio data portion is discarded, and the mute data is output to the audio processing unit 202 via the changeover switch 608. The audio processing unit 202 converts the transmitted data into an analog signal and outputs it from the speaker 201.

  In addition, the control frame processing unit 606 sends the control data and CRC data for the control data sent to the third CRC determination unit 607. The third CRC determination unit 607 performs CRC calculation of the control data, compares it with the CRC data for the received control data, determines whether there is a reception error, and notifies the control frame processing unit 606 of the determination result. . The control frame processing unit 606 outputs control data to the control unit 620 when notified that there is no reception error, and discards the control data when notified that there is a reception error. When receiving the control data, the control unit 620 analyzes the control data, activates the voice processing unit 202 if the call start control data, stops the voice processing unit 202 if the disconnection control data, etc. The operation of each part of the receiver is controlled according to the control data.

  Note that the case where communication is performed in the format of FIG. 10 has been described as an example of an embodiment in which communication control is performed by notifying whether or not audio data is divided by a part of the data string in the slot. As another embodiment in which the presence / absence is notified by a part of the data string in the slot and communication control is performed, the format shown in FIG. 11 can be used. FIGS. 11A and 11B are format diagrams showing modifications of the data format. In this case, CRC data in the format of FIG. 11A is calculated from control data and audio data or control data, format type, and audio data, and first CRC data (CRC data 1) in the format of FIG. Is calculated from the control data and the first audio data (audio data 1) or from the control data, the format type and the first audio data. In this case, compared with the case of using the format of FIG. 10, the transmission data is reduced by the amount of CRC data dedicated to control data, which is advantageous when it is desired to increase the number of multiplexing.

  FIGS. 12A and 12B are format diagrams showing another modification of the data format. In this case, the format type (with division) in FIG. 12 (a) means that the subsequent data is the control data, undivided audio data and CRC data, and the format type (division) in FIG. 12 (b). "None" means that the subsequent data is divided audio data and respective CRC data. In this format, it is easy to make both data length the same, and time division multiplexing control is simplified. Furthermore, since it is possible to send the control data after converting the format at an arbitrary timing, the format shown in FIG. 12A is used only when the control data needs to be sent, and there is no need to send the control data. When communication is possible using the format shown in FIG. 12B, there is no need to transmit idle data indicating that there is no unnecessary control data, and wasteful communication is performed without impairing the convenience of communication control. Can be suppressed.

In each of the first to third embodiments, an example in which a transmitter and a receiver are independent from each other has been described. However, a transmitter and a receiver are incorporated into one device like a base unit and a handset of a cordless telephone. The present invention can also be used in other apparatuses. In this case, when switching the format described in the second embodiment, the wireless communication apparatus that sends a message notifying the switching to the other party notifies the other party that the switching message has been received, and the message for switching the format reaches the other party. By confirming that the formats are switched between each other, it is possible to prevent the formats from colliding with each other when a message is lost due to a communication error.

  As described above, according to the present embodiment, the transmitter 500 and the receiver 600 communicate using the time division multiplexing method, and synchronization data and error detection data are added to transmission data transmitted in one slot. The transmitter 500 is transmitted in one slot with a first error detection data generating unit 502 that generates error detection data of transmission voice data transmitted in one slot. A second error detection data generation unit 504 that divides transmission audio data into a plurality of data strings and generates error detection data of each of the divided data strings, and error detection data of transmission control data transmitted in one slot The error detection data generated by the third error detection data generation unit 505 that generates the error detection data and the first and third error detection data generation units 502 and 505 are generated. A first frame generation unit 501 for generating a transmission data string to be transmitted in one slot from the first format type data indicating that the transmission data, the audio data and the audio data are not divided, and second and third errors Second data for generating a transmission data string to be transmitted in one slot from the error detection data generated by the detection data generation units 504 and 505, transmission data, and second format type data indicating that the audio data is divided. A frame generation unit 503, a transmission unit 109 that transmits the transmission data sequence generated by the first frame generation unit 501 or the transmission data sequence generated by the second frame generation unit 503, and a control unit 520 that controls the whole The control unit 520 generates the transmission data sequence generated by the first frame generation unit 501 or the second frame generation unit 503. Any one of the transmission data strings is selected and transmitted to the transmission unit 109, and the receiver 600 determines whether the format type is first or second and receives the received data according to the determination result of the first or second. Format determination data separation unit 601 for separating data, a first error detection unit 603 for detecting an error in reception voice data received in one slot, and reception voice data received in one slot divided into a plurality of data strings And a second error detection unit 605 that detects errors in each of the divided data strings, a third error detection unit 607 that detects errors in reception control data received in one slot, and controls the whole. The control unit 620 includes the first and third error detections according to the format type determination result in the format determination data separation unit 601. The received data is processed based on the error detection results detected by the knowledge units 603 and 607, or the received data is processed based on the error detection results detected by the second and third error detection units 605 and 607. Based on the slot type, communication in two data formats is possible, and the data length for error detection and correction for each divided data and the data that is not divided If the data length for error detection / correction is the same, the length of the transmission data plus the data for error detection / correction does not divide the data compared to the case where the data is divided and sent. In the slot that transmits data without dividing the data, an unused part is created in the data in the slot, and control data such as cutting this unused part is sent. It can be used as a field for control data, and the data format can be switched as needed to enable communication by multiplexing control data and communication data. It is possible to reduce the number of discarded data, and there is no need to send control data every time during communication, and there is no control data sent in the control data part when there is no need to send control data. It is possible to reduce idle data transmission triggers indicating unnecessary transmissions.

In addition, the second error detection data generation unit 504 does not generate error detection data of the transmission control data, and the second frame generation unit 503 does not include the transmission control data in the transmission data string, and the third error detection data The error detection data generated by the data generation unit 505 is not used for generation of a transmission data string, and the transmission timing of idle data indicating that there is no control data transmitted in the control data portion is reduced. It is possible to reduce wasteful transmission.

  The present invention relates to a wireless communication apparatus that performs communication such as voice data using a radio signal, and a wireless communication method that performs communication such as voice data using a radio signal, and whether or not each divided data is normal data. Thus, an advantageous effect is obtained that the number of data discarded when it is detected that the data is abnormal can be reduced.

(A) Block diagram showing a transmitter constituting the wireless communication apparatus according to Embodiment 1 of the present invention, (b) Block diagram showing a receiver constituting the wireless communication apparatus according to Embodiment 1 of the present invention. (A) A format diagram showing a data format used in communication in the wireless communication apparatus of FIG. 1, and (b) a format diagram showing a data format used in communication in the wireless communication apparatus of FIG. FIG. 1 is a timing chart showing slot timings during communication in the wireless communication apparatus of FIG. (A) Block diagram showing a transmitter constituting the wireless communication apparatus according to the second embodiment of the present invention, (b) Block diagram showing a receiver constituting the wireless communication apparatus according to the second embodiment of the present invention. (A) A format diagram showing a data format used in communication in the wireless communication apparatus of FIG. 4, (b) A format diagram showing a data format used in communication in the wireless communication apparatus of FIG. 4, (c) FIG. 4 is a format diagram showing a data format used for communication in the wireless communication device 4 FIG. 4 is a timing chart showing the slot timing during communication in the wireless communication apparatus of FIG. Explanatory drawing which shows the data format used in the case of communication of the transmitter and receiver of Embodiment 2 of this invention Explanatory drawing which shows the timing of the slot at the time of communication in Embodiment 2 of this invention (A) Block diagram showing a transmitter constituting the wireless communication apparatus according to Embodiment 3 of the present invention, (b) Block diagram showing a receiver constituting the wireless communication apparatus according to Embodiment 3 of the present invention. (A) A format diagram showing a data format used for communication in the wireless communication device of FIG. 9, and (b) a format diagram showing a data format used for communication in the wireless communication device of FIG. (A) Format diagram showing a modification of the data format, (b) Format diagram showing a modification of the data format (A) Format diagram showing another modification of data format, (b) Format diagram showing another modification of data format

Explanation of symbols

100, 300, 500 Transmitter 102, 202 Audio processing unit 103, 208 First change-over switch 104, 501 First frame generation unit 105, 502 First CRC generation unit (first error detection data generation unit)
106, 503 Second frame generation unit 107, 504 Second CRC generation unit (second error detection data generation unit)
108, 203 Second changeover switch 109 Transmitter 110, 210 Antenna 111 Slot timing measurement unit 112 Operation unit 120, 220, 320, 420, 520, 620 Control unit 200, 400, 600 Receiver 201 Speaker 202 Audio processing unit 204 First frame processing unit 205, 603 First CRC determination unit (first error detection unit)
206 Second frame processing unit 207, 605 Second CRC determination unit (second error detection unit)
209 Slot timing measurement unit 301 First audio frame generation unit 302 Second audio frame generation unit 303 Control data frame generation unit 304, 505 Third CRC generation unit (third error detection data generation unit)
305 Third switch 401, 602 First audio frame processing unit 402, 604 Second audio frame processing unit 403, 606 Control frame processing unit 404, 607 Third CRC determination unit (third error detection unit)
405 Slot type determination unit 601 Format determination data separation unit 608 changeover switch

Claims (14)

A wireless communication apparatus that includes a transmitter and a receiver that perform communication using time division multiplexing, and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot,
The transmitter divides the transmission data transmitted in one slot into a plurality of data strings and the first error detection data generation unit that generates error detection data of transmission data transmitted in one slot. A second error detection data generation unit that generates error detection data for each of the received data strings, a transmission that is transmitted in one slot from the error detection data generated by the first error detection data generation unit and the transmission data A first frame generating unit that generates a data sequence, a second frame that generates a transmission data sequence to be transmitted in one slot from the error detection data generated by the second error detection data generation unit and the transmission data The generation unit and the transmission data sequence generated by the first frame generation unit or the transmission data sequence generated by the second frame generation unit are transmitted. A first slot timing measurement unit that counts a predetermined cycle, and a control unit that controls the whole, wherein the control unit has the first frame at a cycle determined by the slot timing measurement unit. Select either the transmission data sequence generated by the generation unit or the transmission data sequence generated by the second frame generation unit and send it to the transmission unit,
The receiver includes a first error detection unit that detects an error in received data received in one slot, and divides the received data received in the one slot into a plurality of data strings and the divided data string A second error detection unit that detects each of the errors, a second slot timing measurement unit that counts the predetermined period, and a control unit that controls the whole, the control unit including the slot timing measurement The received data is processed based on the error detection result detected by the first error detection unit or the error detection result detected by the second error detection unit at a cycle determined by the first error detection unit. A wireless communication apparatus that selects whether to perform the process. The transmission data sequence is generated by adding control data to the transmission data sequence generated by the first frame generation unit or the transmission data sequence generated by the second frame generation unit. The wireless communication device described. Consists of a transmitter and a receiver that perform communication using time division multiplexing, slot type data indicating the slot type of a voice data slot or a control data slot, and synchronization data in transmission data transmitted in one slot A wireless communication device that performs communication with error detection data added thereto,
The transmitter divides the transmission data transmitted in one slot into a plurality of data strings and the first error detection data generation unit that generates error detection data of transmission data transmitted in one slot. A second error detection data generation unit that generates error detection data for each of the data sequences, the error detection data generated by the first error detection data generation unit, the transmission data, and the first slot type data, 1 from the first frame generation unit that generates a transmission data sequence to be transmitted in one slot, the error detection data generated by the second error detection data generation unit, the transmission data, and the second slot type data A second frame generation unit for generating a transmission data sequence to be transmitted in the slot, a transmission data sequence including control data and third slot type data A control data frame generation unit, a transmission data sequence generated by the first frame generation unit, a transmission data sequence generated by the second frame generation unit, and a transmission data sequence generated by the control data frame generation unit, And a control unit that controls the whole. The control unit generates the transmission data sequence generated by the first frame generation unit and the second frame generation unit. Select one of the transmission data sequence and the transmission data sequence generated by the control data frame generation unit and send it to the transmission unit,
The receiver includes a slot type discriminating unit that discriminates a slot type based on the first, second, and third slot type data, and a first error that detects an error in received voice data received in one slot. A detection unit, a second error detection unit that divides reception voice data received in the one slot into a plurality of data strings and detects errors in the divided data strings, and is received in one slot A third error detection unit that detects an error in the reception control data; and a control unit that controls the whole, wherein the control unit is configured to perform the first error based on a determination result in the slot type determination unit. The received data is processed based on the error detection result detected by the detection unit, the received data is processed based on the error detection result detected by the second error detection unit, or the third Wireless communication device and selects based on detected error detection result at the error detection unit whether to process the received data. 4. The radio according to claim 3, wherein the first and second slot type data indicate a slot of audio data, and the third slot type data indicates a slot of control data. Communication device. The radio communication apparatus according to claim 3 or 4, wherein the audio data is divided into four in the transmission data sequence generated by the second frame generation unit. A wireless communication apparatus that includes a transmitter and a receiver that perform communication using time division multiplexing, and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot,
The transmitter divides transmission audio data transmitted in one slot into a plurality of data strings, and a first error detection data generation unit that generates error detection data of transmission audio data transmitted in one slot. A second error detection data generation unit that generates error detection data of each of the divided data strings; a third error detection data generation unit that generates error detection data of transmission control data transmitted in one slot; Transmission data transmitted in one slot from the error detection data generated by the first and third error detection data generation units, and the first format type data indicating that the transmission data and audio data are not divided Error detection data generated by a first frame generation unit for generating a sequence and the second and third error detection data generation units. A second frame generation unit for generating a transmission data sequence to be transmitted in one slot from the second format type data indicating that the transmission data and the audio data are divided, and the first frame generation unit A transmission unit that transmits the transmission data sequence generated in step 2 or the transmission data sequence generated by the second frame generation unit, and a control unit that controls the whole, and the control unit generates the first frame Selecting either the transmission data sequence generated by the transmission unit or the transmission data sequence generated by the second frame generation unit and sending it to the transmission unit,
The receiver determines whether the format type is first or second and separates received data according to the first or second determination result, and received audio received in one slot A first error detecting unit for detecting a data error; and a second error for dividing the received audio data received in the one slot into a plurality of data strings and detecting each error of the divided data strings A detection unit; a third error detection unit that detects an error in reception control data received in one slot; and a control unit that controls the whole, wherein the control unit is a format in the format determination data separation unit. Depending on the type determination result, the received data is processed based on the error detection results detected by the first and third error detection units, or the second and third Wireless communication device and selects based on detected error detection result at the error detection unit whether to process the received data. The third error detection data generation unit does not generate error detection data of the transmission control data, and the second frame generation unit does not include the transmission control data in a transmission data string, and the third error The wireless communication apparatus according to claim 6, wherein the error detection data generated by the detection data generation unit is not used for generation of a transmission data string. This is a wireless communication method in a wireless communication apparatus that includes a transmitter and a receiver that perform communication using a time division multiplexing method and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot. And
In the transmitter, a first error detection data generation step for generating error detection data of transmission data transmitted in one slot, and the transmission data transmitted in one slot are divided into a plurality of data strings and the division The second error detection data generation step for generating the respective error detection data of the data string thus generated, the error detection data generated in the first error detection data generation step, and the transmission data are transmitted in one slot. A first frame generation step for generating a transmission data sequence, a second transmission data sequence for transmitting in one slot from the error detection data generated in the second error detection data generation step and the transmission data. A frame generation step, a first slot timing measurement step for counting a predetermined period, A control step of selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step at a period determined in the slot timing measurement step And a transmission step of transmitting the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step,
In the receiver, a first error detection step of detecting an error of received data received in one slot, and the received data received in the one slot are divided into a plurality of data strings and the divided data In the first error detection step, a second error detection step for detecting each error in the column, a second slot timing measurement step for counting the predetermined period, and a period determined by the slot timing measurement step. And a control step for selecting whether to process the received data based on the detected error detection result or to process the received data based on the error detection result detected in the second error detection step. A wireless communication method. 9. The transmission data string is generated by adding control data to the transmission data string generated in the first frame generation step or the transmission data string generated in the second frame generation step. The wireless communication method described. Consists of a transmitter and a receiver that perform communication using time division multiplexing, slot type data indicating the slot type of a voice data slot or a control data slot, and synchronization data in transmission data transmitted in one slot A wireless communication method in a wireless communication device for performing communication with error detection data added,
In the transmitter, a first error detection data generation step for generating error detection data of transmission data transmitted in one slot, and the transmission data transmitted in one slot are divided into a plurality of data strings and the division A second error detection data generation step for generating error detection data for each of the generated data strings, the error detection data generated in the first error detection data generation step, the transmission data, and the first slot type data From the first frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data, the error detection data generated in the second error detection data generation step, the transmission data, and the second slot type data A second frame generation step for generating a transmission data string to be transmitted in one slot, control data, A control data frame generation step for generating a transmission data sequence including three slot type data, a transmission data sequence generated in the first frame generation step, a transmission data sequence generated in the second frame generation step, and A control step for selecting and transmitting one of the transmission data sequences generated in the control data frame generation step, a transmission data sequence generated in the first frame generation step, and a transmission generated in the second frame generation step A transmission step of transmitting one of the data sequence and the transmission data sequence generated in the control data frame generation step,
In the receiver, a slot type discriminating step for discriminating a slot type based on the first, second and third slot type data, and a first detecting an error of received voice data received in one slot. An error detection step, a second error detection step for dividing the received audio data received in the one slot into a plurality of data strings and detecting an error in each of the divided data strings; Based on the error detection result detected in the first error detection step, based on the determination result in the third error detection step and the slot type determination step. Process the received data based on the error detection result detected in the second error detection step, or Radio communication method characterized by a control step of selecting whether to process the received data based on the detected error detection result at the third error detection step. 11. The radio according to claim 10, wherein the first and second slot type data indicate voice data slots, and the third slot type data indicates control data slots. Communication method. The radio communication method according to claim 10 or 11, wherein the audio data is divided into four in the transmission data sequence generated in the second frame generation step. This is a wireless communication method in a wireless communication apparatus that includes a transmitter and a receiver that perform communication using a time division multiplexing method and performs communication by adding synchronization data and error detection data to transmission data transmitted in one slot. And
In the transmitter, a first error detection data generation step for generating error detection data of transmission voice data transmitted in one slot, and the transmission voice data transmitted in one slot are divided into a plurality of data strings. A second error detection data generation step for generating error detection data for each of the divided data strings; a third error detection data generation step for generating error detection data for transmission control data transmitted in one slot; Transmission transmitted in one slot from the error detection data generated in the first and third error detection data generation steps, and the first format type data indicating that the transmission data and audio data are not divided A first frame generation step of generating a data string; and the second and third error detections A second frame generation step for generating a transmission data string to be transmitted in one slot from the error detection data generated in the data generation step and the second format type data indicating that the transmission data and the audio data are divided A control step of selecting and transmitting either the transmission data sequence generated in the first frame generation step or the transmission data sequence generated in the second frame generation step; and the first frame generation A transmission step of transmitting the transmission data sequence generated in the step or the transmission data sequence generated in the second frame generation step,
In the receiver, a format determination data separation step for determining whether the format type is first or second and separating received data according to the determination result of the first or second and reception received in one slot A first error detection step for detecting an error in the audio data; and a second error detection unit that divides the received audio data received in the one slot into a plurality of data strings and detects errors in the divided data strings. An error detection step; a third error detection step for detecting an error in reception control data received in one slot; and a format type determination result in the format determination data separation step, and The received data is processed based on the error detection result detected in the error detection step or the second and third Radio communication method characterized by a control step of selecting whether the error detection result detected by the error detecting step performs the processing of the received data to the original. In the third error detection data generation step, error detection data of the transmission control data is not generated, and in the second frame generation step, the transmission control data is not included in the transmission data string, and the third error is detected. The wireless communication method according to claim 13, wherein the error detection data generated in the detection data generation step is not used for generation of a transmission data string.

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